Report Generated 11/01/2021 at 0845

Page Description

2 - Mean Daily Water Temperature, Release Flow Rates and Air Temperatures with Monthly Averages

3 - Redding 10-Day Forecasted Air Temperatures

4 - Sacramento River Mean Daily Water Temperature, Air Temperature and 10-Day Forecasted Air Temperature Plot

- Water Temperature Measuring Station Details

- Temperature Control Point Details

5 - Shasta Lake Isothermobaths & Cold Water Pool Statistics

14 - Trinity Lake Isothermobaths & Cold Water Pool Statistics

23 - Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

x - TCD Configuration (External Link)

All Data in this Report is Preliminary and Subject to Change

Northern CVP Water Temperature Report

October - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Sep 4935 1502 6835 70.5 73.6

10/01 61.0 ? 59.5 # - 58.2 58.7 59.2 59.9 60.2 60.7 61.2 56.1 51.4 54.1 57.4 5015 1773 6865 70.5 65.6 68.9

10/02 61.0 ? 60.4 # - 58.5 58.9 59.4 59.9 60.3 60.7 61.2 56.0 51.5 54.1 57.6 4846 1710 6864 73.5 66.4 69.8

10/03 61.2 60.2 # - 58.6 59.0 59.5 60.0 60.4 60.8 61.3 55.8 52.0 54.2 57.7 4848 1804 6864 73.0 65.8 69.3

10/04 61.5 60.1 # - 58.5 58.9 59.4 60.0 60.4 60.9 61.3 55.7 52.3 54.5 57.4 5048 1691 6868 71.5 65.0 68.5

10/05 61.6 60.1 # - 58.7 58.9 59.2 59.7 60.0 60.6 ? 61.0 55.3 52.3 54.0 56.5 4646 1654 6855 67.5 63.6 66.9

10/06 61.8 60.9 # - 58.7 58.9 59.3 59.8 60.0 60.4 60.5 55.7 52.5 54.9 56.8 4415 1656 6864 67.0 64.1 63.5

10/07 61.5 60.5 # - 58.9 59.0 59.2 59.5 59.7 60.1 60.4 55.0 52.4 53.4 56.1 4650 1656 6857 62.5 59.4 59.9

10/08 61.8 60.7 # - 58.7 58.9 59.1 59.2 59.3 59.6 59.8 54.5 52.8 52.0 54.4 4738 1655 6871 56.0 55.6 57.9

10/09 61.8 61.2 # - 58.9 59.1 59.5 59.8 59.9 60.2 ? 60.2 55.4 53.2 53.1 54.3 4817 1660 6947 64.5 60.3 62.1

10/10 61.8 ? 60.6 # - 59.1 59.2 59.5 59.6 59.7 60.0 60.2 55.1 52.6 53.1 54.8 5101 1653 6871 64.0 60.3 62.7

10/11 62.2 61.2 # - 59.1 59.1 59.0 58.9 59.0 59.3 59.2 54.3 52.2 52.0 53.7 4870 1656 6814 58.5 58.4 60.0

10/12 62.0 61.2 # - 58.6 58.6 58.6 58.3 58.1 58.2 57.9 54.1 52.6 50.0 51.6 4960 1682 6810 59.5 54.4 57.5

10/13 62.1 61.2 # - 59.1 59.1 59.3 59.2 59.1 59.2 58.8 54.8 52.3 52.4 52.8 4903 1666 6829 61.0 57.0 58.0

10/14 62.5 61.3 # - 59.2 59.2 59.4 59.1 59.0 59.2 59.2 54.8 52.0 51.7 53.6 4562 1658 6812 64.5 61.2 63.5

10/15 62.3 61.7 # - 59.2 59.3 59.6 59.4 59.3 59.4 59.3 54.9 52.3 51.3 52.9 4483 1653 6820 62.5 56.3 61.0

10/16 62.3 61.5 # - 59.5 59.5 59.8 59.5 59.4 59.6 59.6 54.8 52.6 51.8 53.1 5066 1664 6802 62.0 56.4 60.6

10/17 62.0 60.8 # - 59.8 59.4 59.3 59.0 59.0 59.3 59.1 54.0 52.3 51.0 52.1 5737 759 6795 57.5 54.3 56.4

10/18 62.0 60.9 # - 59.6 59.5 59.6 59.3 59.0 59.1 58.5 54.3 52.5 50.2 52.3 5913 744 6881 52.0 51.3 52.8

10/19 62.2 61.0 # - 59.5 59.3 59.3 58.9 58.6 58.7 58.5 54.0 52.5 50.8 51.3 5943 785 6834 51.5 49.9 51.8

10/20 62.0 60.9 # - 59.7 59.4 59.2 58.9 58.6 58.9 58.3 54.3 52.9 51.4 52.2 5438 726 6484 52.5 53.3 54.1

10/21 62.2 61.0 # - 59.7 59.6 59.8 59.5 59.4 59.5 58.9 55.0 53.4 52.4 53.7 5239 754 6072 61.0 60.1 60.6

10/22 61.5 61.1 # - 59.9 59.9 60.2 60.2 60.3 60.7 60.5 55.7 53.6 53.1 53.3 4399 796 6065 61.0 60.3 60.8

10/23 61.2 61.1 # - 60.0 59.8 59.7 59.5 59.5 59.8 59.9 54.8 53.5 52.2 53.0 4520 760 6049 55.0 55.2 55.7

10/24 60.8 60.6 # - 59.7 59.0 58.9 57.8 57.9 58.2 58.0 55.0 53.7 51.7 51.5 4810 599 6010 56.0 56.3 55.8

10/25 60.8 ? 60.7 # - 59.4 59.4 59.7 58.3 57.5 57.6 57.3 54.9 53.7 51.4 51.3 4599 830 6014 56.5 54.9 57.0

10/26 60.5 ? 60.3 # - 59.3 59.1 59.0 58.4 57.9 58.2 57.8 54.4 53.8 51.9 51.8 4851 690 6061 54.5 55.1 56.3

10/27 60.4 60.1 # - 59.5 59.6 59.9 59.5 59.0 59.1 58.5 55.5 54.1 53.2 52.4 4878 591 5861 61.0 58.2 60.5

10/28 60.0 ? 59.9 # - 59.4 59.6 60.1 60.0 59.8 60.1 60.1 55.7 54.3 54.1 53.6 5385 364 5632 65.0 58.8 61.3

10/29 59.9 59.6 # - 59.6 59.7 60.0 60.1 60.1 60.4 60.4 55.5 54.5 54.4 54.2 4798 396 5422 61.5 58.4 60.9

10/30 59.7 59.5 # - 59.2 59.4 59.8 60.3 60.5 60.9 60.8 55.5 54.5 54.8 55.0 4796 451 5203 60.5 60.5 61.2

10/31 59.6 59.3 # - 59.1 59.1 59.4 59.5 59.6 60.0 60.4 54.9 54.4 54.2 54.4 4432 399 5040 58.0 56.8 56.2

Oct 4926 1179 6453 58.5 60.4

152706 36535 200036

Legend Notes 302886 72466 396763

? = 1-9 hours of data missing (Average includes estimations) 1 Temperatures are weighted averages based on individual penstock flow and temperature

! = 10 or more hours of data missing (Average not calculated) Highlighted cells in the TCD column indicate a TCD change was made on that day

# = Station out of service 2 Current Sacramento River control point (see page 4 for more details)

↑ = Record high air temperature

↓ = Record low air temperature

 = Monthly Averages

Total AF

61.6 56.7

RDB

59.6 55.0

LWS

52.9 52.7

DGC

54.4

Mean Daily Air 

Temperatures (°F)

RDD

76.4

Total CFS

54.0 61.3

Mean Daily 

Release (CFS)

NFH

57.5

Mean Daily Water Temperatures (°F)

51.3

JLF BND IGO

59.2

BSF

- 57.1 57.6 58.2 59.2 60.0 60.8

D

A

T

E

58.0 57.4

SAC CCR 2 TCD1 SHD SPP1 KWK

61.4 60.6 - 59.2 59.4 59.4 59.4 59.7

2
↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg

10/01 52 94 73.0 54 91 72.5 53 92 72.5 54 92 73.0 54 89 71.5 52 83 67.5 50 76 63.0 48 73 60.5 51 72 61.5 49 73 61.0 49 77 63.0 49 80 64.5

10/02 51 90 70.5 52 93 72.5 54 92 73.0 55 88 71.5 53 81 67.0 49 72 60.5 48 70 59.0 44 66 55.0 52 80 66.0 47 80 63.5 48 79 63.5 50 75 62.5

10/03 51 96 73.5 54 93 73.5 54 89 71.5 53 81 67.0 49 71 60.0 51 68 59.5 46 65 55.5 43 73 58.0 48 81 64.5 48 78 63.0 46 75 60.5 45 76 60.5

10/04 53 93 73.0 55 89 72.0 52 80 66.0 49 69 59.0 49 72 60.5 43 70 56.5 43 74 58.5 45 78 61.5 52 74 63.0 44 74 59.0 44 72 58.0 45 71 58.0

10/05 53 90 71.5 53 81 67.0 49 71 60.0 48 72 60.0 43 69 56.0 44 75 59.5 46 80 63.0 46 68 57.0 49 73 61.0 46 69 57.5 47 77 62.0 50 77 63.5

10/06 52 83 67.5 60 73 66.5 48 72 60.0 45 69 57.0 43 74 58.5 45 78 61.5 44 69 56.5 39 68 53.5 45 76 60.5 48 77 62.5 45 77 61.0 48 77 62.5

10/07 58 76 67.0 52 72 62.0 44 67 55.5 43 74 58.5 44 78 61.0 41 65 53.0 38 68 53.0 40 71 55.5 46 78 62.0 49 80 64.5 47 79 63.0 44 80 62.0

10/08 51 74 62.5 44 69 56.5 41 73 57.0 43 79 61.0 42 65 53.5 39 69 54.0 38 69 53.5 40 76 58.0 51 85 68.0 48 78 63.0 43 76 59.5 48 76 62.0

10/09 43 69 56.0 50 74 62.0 44 79 61.5 40 65 52.5 38 69 53.5 39 71 55.0 42 77 59.5 44 81 62.5 48 85 66.5 46 78 62.0 46 76 61.0 47 74 60.5

10/10 50 79 64.5 46 80 63.0 42 64 53.0 37 68 52.5 41 68 54.5 41 76 58.5 42 81 61.5 45 81 63.0 49 86 67.5 47 80 63.5 46 81 63.5 47 78 62.5

10/11 44 84 64.0 52 67 59.5 43 70 56.5 42 72 57.0 41 75 58.0 46 79 62.5 47 82 64.5 49 80 64.5 50 87 68.5 48 80 64.0 45 75 60.0 46 71 58.5

10/12 50 67 58.5 49 71 60.0 45 69 57.0 45 75 60.0 46 80 63.0 43 81 62.0 45 81 63.0 44 81 62.5 49 82 65.5 48 70 59.0 51 73 62.0 48 76 62.0

10/13 48 71 59.5 51 70 60.5 44 75 59.5 42 80 61.0 44 83 63.5 45 77 61.0 43 73 58.0 42 72 57.0 49 78 63.5 45 78 61.5 47 79 63.0 46 78 62.0

10/14 51 71 61.0 56 77 66.5 42 81 61.5 45 84 64.5 45 73 59.0 41 66 53.5 40 71 55.5 44 67 55.5 49 86 67.5 49 79 64.0 48 75 61.5 46 72 59.0

10/15 52 77 64.5 44 81 62.5 44 84 64.0 45 72 58.5 39 63 51.0 38 66 52.0 44 61 52.5 47 68 57.5 52 84 68.0 50 80 65.0 49 75 62.0 47 73 60.0

10/16 44 81 62.5 42 85 63.5 43 71 57.0 36 61 48.5 37 66 51.5 43 57 50.0 47 69 58.0 49 69 59.0 53 70 61.5 54 64 59.0 49 71 60.0 46 68 57.0

10/17 41 83 62.0 44 72 58.0 38 59 48.5 36 64 50.0 43 55 49.0 46 61 53.5 51 64 57.5 47 59 53.0 47 63 55.0 52 61 56.5 44 66 55.0 44 71 57.5

10/18 42 73 57.5 49 60 54.5 37 61 49.0 43 55 49.0 47 60 53.5 51 64 57.5 47 59 53.0 46 59 52.5 48 64 56.0 52 63 57.5 44 65 54.5 44 64 54.0

10/19 44 60 52.0 39 63 51.0 44 57 50.5 48 60 54.0 50 62 56.0 47 56 51.5 46 57 51.5 45 58 51.5 49 63 56.0 46 70 58.0 48 69 58.5 48 67 57.5

10/20 39 64 51.5 47 57 52.0 47 62 54.5 48 63 55.5 44 54 49.0 46 56 51.0 47 57 52.0 42 57 49.5 47 71 59.0 52 74 63.0 50 70 60.0 46 72 59.0

10/21 50 55 52.5 55 63 59.0 50 64 57.0 47 56 51.5 47 57 52.0 44 56 50.0 43 56 49.5 46 61 53.5 47 76 61.5 53 76 64.5 51 72 61.5 49 65 57.0

10/22 55 67 61.0 56 64 60.0 47 57 52.0 48 56 52.0 43 55 49.0 42 52 47.0 44 63 53.5 43 70 56.5 52 70 61.0 52 73 62.5 53 70 61.5 50 68 59.0

10/23 54 68 61.0 53 55 54.0 46 57 51.5 43 57 50.0 42 54 48.0 45 66 55.5 44 71 57.5 45 69 57.0 52 73 62.5 45 72 58.5 44 73 58.5 46 71 58.5

10/24 52 58 55.0 54 58 56.0 45 58 51.5 43 55 49.0 45 66 55.5 45 74 59.5 46 69 57.5 46 68 57.0 48 77 62.5 48 75 61.5 48 72 60.0 48 68 58.0

10/25 54 58 56.0 47 59 53.0 44 56 50.0 46 66 56.0 45 74 59.5 46 71 58.5 46 67 56.5 46 66 56.0 49 70 59.5 46 71 58.5 48 70 59.0 51 71 61.0

10/26 48 65 56.5 53 56 54.5 51 66 58.5 51 75 63.0 49 71 60.0 50 65 57.5 46 66 56.0 44 63 53.5 47 71 59.0 50 66 58.0 46 64 55.0 43 67 55.0

10/27 53 56 54.5 54 67 60.5 47 76 61.5 48 73 60.5 49 67 58.0 45 65 55.0 45 60 52.5 46 64 55.0 50 69 59.5 52 69 60.5 46 62 54.0 44 61 52.5

10/28 54 68 61.0 53 75 64.0 47 71 59.0 48 66 57.0 46 64 55.0 46 59 52.5 46 64 55.0 45 62 53.5 45 68 56.5 47 66 56.5 42 65 53.5 41 66 53.5

10/29 51 79 65.0 50 73 61.5 50 64 57.0 46 63 54.5 47 57 52.0 49 63 56.0 46 61 53.5 47 62 54.5 45 64 54.5 44 66 55.0 44 70 57.0 47 71 59.0

10/30 49 74 61.5 59 66 62.5 47 63 55.0 45 58 51.5 48 65 56.5 43 64 53.5 47 64 55.5 43 65 54.0 46 72 59.0 42 70 56.0 44 66 55.0 46 67 56.5

10/31 54 67 60.5 51 64 57.5 48 58 53.0 48 65 56.5 44 67 55.5 49 63 56.0 44 63 53.5 42 64 53.0 47 75 61.0 48 70 59.0 47 68 57.5 45 62 53.5

Web Links Legend

10-Day Min/Max Forecast NR = Forecasted temperatures not recorded

Previous Days Min/Max Actuals 100 = Previous day actual temperatures in red and bolded indicate a record temperature for that date

8 Days

D

A

T

E

Forecasted

4 Days 5 Days 6 Days

Actual

Previous Day Current Day 1 Day 2 Days 3 Days 7 Days 9 Days 10 Days

Redding (RDD) Daily Air Temperatures (°F)

3
Code Body of Water Location1 CDEC Link River Point Temp. (°F) Begin Date End Date

TCD N/A Shasta Power Plant N/A Sacramento CCR 56 09/21/2020 04/18/2021

SHD Sacramento River 0.3 miles downstream of Shasta Power Plant Click Here Sacramento CCR 60 04/18/2021 05/17/2021

SPP N/A Spring Creek Power Plant N/A Sacramento SAC 57 05/17/2021 06/15/2021

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Sacramento SAC 55 06/15/2021 TBD

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here Trinity DGC 56 09/15/2021 10/01/2021

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2021 12/31/2021

BSF Sacramento River 25 miles downstream of Keswick Dam Click Here

JLF Sacramento River 34 miles downstream of Keswick Dam Click Here

BND Sacramento River 41 miles downstream of Keswick Dam Click Here

RDB Sacramento River 58 miles downstream of Keswick Dam Click Here

IGO Clear Creek 7.3 miles downstream of Whiskeytown Dam Click Here

LWS Trinity River 1.1 miles downstream of Lewiston Dam Click Here Notes

DGC Trinity River 19 miles downstream of Lewiston Dam Click Here

NFH Trinity River 38 miles downstream of Lewiston Dam Click Here 1 Distances are approximate

Station Details Water Right Temperature Control Points

46

49

52

55

58

61

64

67

70

73

76

54

55

56

57

58

59

60

61

62

63

64

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 10/27/2021 at 1250

Latest Profile Date: 10/27/2021

Page Description

6 - Shasta Lake Isothermobaths Plot

7 - Shasta Lake Cold Water Pool Volume ≤52°F

8 - Shasta Lake Cold Water Pool Volume ≤50°F

9 - Shasta Lake Cold Water Pool Volume ≤48°F

10 - Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

11 - Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

12 - Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

13 - Shasta Lake Cold Water Pool Comparison by Year

Shasta Lake Isothermobaths & Cold Water Pool Statistics

2021

5
6

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
7

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F

Avg (1998-2020) 2014 2015 2016 2019 2021
8

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F

Avg (1998-2020) 2014 2015 2016 2019 2021
9

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F

Avg (1998-2020) 2014 2015 2016 2019 2021
10

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
11

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
12

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
Oct-27

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

1998 114 29 6 50 332 119 125 192

1999 461 388 303 384 1343 1620 6217 3060

2000 220 118 34 124 641 492 692 608

2001 134 102 78 104 391 424 1591 802

2002 282 224 154 220 821 935 3161 1639

2003 293 111 20 141 853 465 402 574

2004 73 55 35 54 212 228 720 387

2005 74 40 24 46 214 167 484 289

2006 308 226 143 226 896 944 2934 1591

2007 44 35 34 38 127 145 705 326

2008 12 15 24 17 35 63 494 197

2009 57 44 44 48 165 186 893 414

2010 494 315 152 320 1438 1314 3115 1956

2011 642 518 397 519 1870 2164 8141 4058

2012 374 318 227 307 1089 1330 4662 2360

2013 147 127 99 124 428 532 2032 997

2014 45 19 10 25 131 81 199 137

2015 94 68 16 59 272 285 323 294

2016 440 375 204 340 1282 1568 4185 2345

2017 531 422 318 424 1546 1761 6525 3277

2018 215 147 60 141 627 613 1221 820

2019 648 524 375 516 1886 2189 7689 3921

2020 154 82 22 86 450 344 447 413

2021 0 0 0 0 0 0 0 0

∆ TAF % ∆

Shasta Lake Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

13
Updated 10/21/2021 at 1357

Latest Profile Date: 10/21/2021

Page Description

15 - Trinity Lake Isothermobaths Plot

16 - Trinity Lake Cold Water Pool Volume ≤52°F

17 - Trinity Lake Cold Water Pool Volume ≤50°F

18 - Trinity Lake Cold Water Pool Volume ≤48°F

19 - Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

20 - Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

21 - Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

22 - Trinity Lake Cold Water Pool Comparison by Year

Trinity Lake Isothermobaths & Cold Water Pool Statistics

2021

14
15

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
16

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F

Avg (2000-2020) 2014 2015 2016 2019 2021
17

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F

Avg (2000-2020) 2014 2015 2016 2019 2021
18

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F

Avg (2000-2020) 2014 2015 2016 2019 2021
19

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
20

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
21

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Oct-21

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

2000 606 436 238 427 411 355 257 341

2001 436 374 266 358 296 305 286 296

2002 465 394 306 388 315 321 330 322

2003 668 456 222 449 453 372 239 355

2004 437 327 174 313 297 266 187 250

2005 725 557 262 515 492 454 283 410

2006 900 605 421 642 611 493 454 519

2007 545 492 402 480 370 401 434 402

2008 190 122 65 126 129 100 70 99

2009 203 144 64 137 138 118 69 108

2010 523 362 137 341 355 295 148 266

2011 967 799 559 775 656 651 603 637

2012 792 740 631 721 538 603 681 607

2013 345 287 186 273 234 234 201 223

2014 -15 -14 -17 15 -10 -11 -18 13

2015 -53 -54 -59 56 -36 -44 -64 48

2016 193 118 79 130 131 96 85 104

2017 698 512 348 519 474 417 375 422

2018 688 628 510 609 467 512 550 510

2019 976 870 711 852 663 709 767 713

2020 476 432 281 396 323 352 303 326

2021 0 0 0 0 0 0 0 0

Trinity Cold Water Pool Comparison by Year (for Specified Date)

∆ TAF % ∆

Historic - Current (Historic - Current) / Current

22
Updated 10/19/2021 at 1516

Latest Profile Date: 10/19/2021

Page Description

24 - Whiskeytown Lake Isothermobaths Plot

25 - Whiskeytown Lake Cold Water Pool Volume ≤60°F

26 - Whiskeytown Lake Cold Water Pool Volume ≤58°F

27 - Whiskeytown Lake Cold Water Pool Volume ≤56°F

28 - Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances

29 - Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances

30 - Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances

31 - Whiskeytown Lake Cold Water Pool Comparison by Year

Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

2021

23
24

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
25

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F

Avg (2000-2020) 2014 2015 2016 2019 2021
26

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F

Avg (2000-2020) 2014 2015 2016 2019 2021
27

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F

Avg (2000-2020) 2014 2015 2016 2019 2021
28

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
29

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
30

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Oct-19

2021 ≤60° ≤58° ≤56° Abs. Avg. ≤60° ≤58° ≤56° Abs. Avg.

2000 -8 -6 -1 5 -6 -5 -1 4

2001 12 20 32 21 9 17 35 21

2002 24 27 30 27 19 24 33 25

2003 18 27 42 29 15 24 46 28

2004 50 55 61 55 40 49 67 52

2005 12 6 -66 28 9 5 -73 29

2006 16 25 41 27 13 22 46 27

2007 35 44 -16 32 29 39 -17 28

2008 5 11 24 14 4 10 27 14

2009 13 10 -34 19 11 9 -38 19

2010 39 -56 -77 57 32 -50 -85 56

2011 21 26 14 20 17 24 15 19

2012 49 -13 -36 33 40 -11 -40 30

2013 106 14 23 48 86 13 25 41

2014 10 -13 -57 27 8 -12 -63 28

2015 17 -76 -90 61 14 -68 -100 60

2016 32 -75 -90 66 26 -67 -100 64

2017 92 -21 -15 43 75 -19 -17 37

2018 31 18 -79 43 26 16 -87 43

2019 -33 -41 -42 39 -27 -36 -46 37

2020 0 0 0 0 0 0 0 0

∆ TAF % ∆

Whiskeytown Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

31